Qt5.12实战之控件设计

1. QPushButton使用

静态创建,通过设计窗口拖放控件:

添加信号处理:

为Pressed,Released,Clicked三个按钮添加信号

自动添加的信号槽:

动态生成的槽定义:

动态创建创建QPushButton

QPushButton *btn = new QPushButton(QString::fromLocal8Bit("动态添加的按钮"),this);
        connect(btn,SIGNAL(clicked()),this,SLOT(on_cust_dynbtn()));
        ui->gridLayout->addWidget(btn, 4, 0, 1, 1);

动态创建QToolButton

 QToolButton *tool = new QToolButton(this);
        tool->setArrowType(Qt::LeftArrow);
        tool->setText(QString::fromLocal8Bit("自动创建的工具按钮"));
        tool->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);
        connect(tool,SIGNAL(clicked()),this,SLOT(on_cust_tool_clicked()));
        ui->gridLayout->addWidget(tool,5,0,1,1);

QRadioButton使用:

先在设计窗口调整好控件布局

使用代码添加到按钮组:

//按钮组
    group = new QButtonGroup(this);
    group->addButton(ui->radioButton,0);
    group->addButton(ui->radioButton_2,1);
    group->addButton(ui->radioButton_3,2);
    ui->radioButton->setChecked(true);//默认项

对按钮组中的控件进行信号连接

 //信号连接
    connect(ui->radioButton,SIGNAL(clicked(bool)),this,SLOT(on_radiobtn_checked(bool)));
    connect(ui->radioButton_2,SIGNAL(clicked(bool)),this,SLOT(on_radiobtn_checked(bool)));
    connect(ui->radioButton_3,SIGNAL(clicked(bool)),this,SLOT(on_radiobtn_checked(bool)));

QCheckBox使用:

动态创建:

strList1<<"One"<<"Two"<<"Three";
    //指向QCheckBox的指针
    QCheckBox *exclusive[3];
    //创建按钮组
    group = new QButtonGroup(this);
    //动态创建QCheckBox并添加到按钮组
    for (int i=0;i<strList1.size() ;i++ ) {
        exclusive[i] = new QCheckBox(strList1[i],this);
        //设置QCheckBox几何位置与控件大小
        //没有添加布局层的可用setGeometry
        //添加了布局层的只能用addWidget
        exclusive[i]->setGeometry(50,50+i*50,200,30);
        //信号连接
        connect(exclusive[i],SIGNAL(stateChanged(int)),this,SLOT(on_stateChanged(int)));
        group->addButton(exclusive[i],i);
    }
    group->setExclusive(true);//true:单选 false:复选

QListView使用:

//初始化数据模型
    model = new QStringListModel(this);
    model->setStringList(strList1);
    listview=new QListView(this);
    //临时更新数据集
    QStringList tmp = model->stringList();
    tmp.append("Four");
    tmp<<"Fire"<<"Six";
    model->setStringList(tmp);

    listview->setModel(model);

    listview->setGeometry(50,200,300,300);

    listview->model()->removeRow(model->rowCount()-1);
    listview->model()->removeRows(3,2);